Mechanism analysis of grain growth dominated by alloy …
2023年9月1日 · Studies have shown that the interlocking wavy interface (or transition range) between dissimilar alloys can help improve the interface bonding strength [8–10], and produce curved grains. Compared with typical grain morphologies, curved grains have the potential to increase high-temperature creep and fatigue life [11, 12].
Anisotropic power diagrams for polycrystal modelling: Efficient ...
2024年10月1日 · We propose a novel approach to generate APDs with prescribed statistical properties, including fine control over the size of individual grains. To this end, we rely on fast optimal transport algorithms that stream well on Graphics Processing Units (GPU) and handle non-uniform, anisotropic distance functions.
On the variability of grain boundary mobility in the …
2023年9月15日 · In this work, we use molecular dynamics simulations to quantify uncertainty in the reduced mobility of curved grain boundaries for different types of boundary conditions and over a range of initial velocity seeds. We consider cylindrical island grains in Ni with a [001] tilt axis as a model system.
Revealing grain boundary kinetics in three-dimensional space
2024年4月15日 · Such curved disconnection-mediated GB curving and migration can coordinate among multiple GBs, and contribute to 3D grain growth/annihilation in GB networks. This curved disconnection-based 3D GB kinetics elucidates a long-elusive perspective in GB deformation, significantly advancing current knowledge of GB-mediated plasticity in metallic ...
GitHub - mbuze/PyAPD: Computing (optimal) anisotropic power …
A Python library for computing (optimal) anisotropic power diagrams using GPU acceleration. Current main application concerns geometric modelling of polycrystalline materials with curved boundaries with grains of prescribed volumes and fine control over aspect ratio and location of …
Modeling of abnormal grain growth in (111) oriented and …
2021年10月14日 · First, we shall review briefly the mobility and driving force of an ordinary grain growth. Figure 4 shows a schematic diagram of two grains with a curved grain boundary between them. The grain boundary tends to move to the left as indicated by the two black arrows.
Dynamics of grain boundaries play a crucial role in determining the grain structure and defining materials properties across multiple scales. Experimental and computational studies give useful insight into the geometric features and the crystallography of the grain boundary network in polycrystalline microstructures.
Studies have shown that the interlocking wavy interface (or transition range) between dissimilar alloys can help improve the interface bonding strength [8–10], and pro-duce curved grains. Compared with typical grain mor-phologies, curved grains have the potential to increase high-temperature creep and fatigue life [11,12].
Quantifying the differences in properties between polycrystals ...
2022年11月22日 · In this study, we have investigated the difference in materials properties between polycrystalline systems comprised of planar grain boundaries and curved grain boundaries. Several structural...
Abnormal grain growth occurs in polycrystalline Cu. It is abnormal because of the bi-modal distribution of grains, where a small number of very large grains whose diameter can be hundred...
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